473,406 Members | 2,259 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,406 software developers and data experts.

Reg Expression Help

Alright, I have the following string:

--------------
Info
Info
Info

Info
Info
Info
--------------------

The string is several lines of information (all about one item) then a blank line. Then a series of information about another item,
etc, etc.

I'm trying to split this into each different section using the regular expression:
^$ (with multiline turned on)

This works fine in the tools "The Regulator" and "The Regex Coach". It splits (more-or-less) right where it should. However, when
I actually run the split in my code, it does not separate, but instead returns only 1 "section" (of the entire string). Any ideas
what might be causing this?
Here's the C# code:

RegexOptions options = RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline | RegexOptions.IgnoreCase;
Regex typeReg = new Regex("^$", options);
string []sections = typeReg.Split(str); //str is a string read in from the data file
Another problem I'm noticing when using those tools (a problem that I would like to get rid of), is that the newlines are present
from the split points. Is it possible to split there and also remove those newlines (so my sections don't have extraneous pieces to
them)?
Thanks!
--
Adam Clauss
ca*****@tamu.edu

Nov 16 '05 #1
1 1128
Adam,

Try using:

^\r$

Windows text files use "\r\n" as the line terminating character. Your "^$"
regex will not match a blank line because the $ stops after the \r but
before the \n. You can verify this with Expresso.

Jim

Expresso can be found at http://www.ultrapico.com
Nov 16 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

23
by: Paul Rubin | last post by:
OK, I want to scan a file for lines matching a certain regexp. I'd like to use an assignment expression, like for line in file: if (g := re.match(pat, line)): croggle(g.group(1)) Since...
4
by: Rex_chaos | last post by:
Hi all, As some book tells, I try the following example of expression template. template < typename LeftOpd, typename Op, typename RightOpd > struct LOP { LeftOpd lod; RightOpd rod;
5
by: Bradley Plett | last post by:
I'm hopeless at regular expressions (I just don't use them often enough to gain/maintain knowledge), but I need one now and am looking for help. I need to parse through a document to find a URL,...
2
by: Mike Turco | last post by:
I like using the expression builder for a lot of different things but it isn't always available when I want to use it, for example in the code window, or in all of the control properties. I am...
7
by: Billa | last post by:
Hi, I am replaceing a big string using different regular expressions (see some example at the end of the message). The problem is whenever I apply a "replace" it makes a new copy of string and I...
9
by: Pete Davis | last post by:
I'm using regular expressions to extract some data and some links from some web pages. I download the page and then I want to get a list of certain links. For building regular expressions, I use...
25
by: Mike | last post by:
I have a regular expression (^(.+)(?=\s*).*\1 ) that results in matches. I would like to get what the actual regular expression is. In other words, when I apply ^(.+)(?=\s*).*\1 to " HEART...
9
by: sarathy | last post by:
Hi, Can anyone just help me with what exactly is constant expression. I read the section on Constant expression in K&R2. i am not fully clear with it.
3
by: Mr.Steskal | last post by:
Posted: Wed Jul 11, 2007 7:01 am Post subject: Regular Expression Help -------------------------------------------------------------------------------- I need help writing a regular...
4
by: carlos | last post by:
I am working on a regular expression validation for my search page. What I have so far works for most cases, but I would like to fine tune it some. I am new to regular expressions, and I do not...
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.